Log formatters

Log formatters format log messages so they can be used by various log handlers.

Handlers can be configured with a log formatter that knows how to format log records. The event, which is represented by the log record object, is passed to the appropriate formatter by the handler. The formatter returns formatted output to the handler, which writes the output to the output device.

The formatter is responsible for rendering the event for output. This formatter uses the resource bundle that is specified in the event to look up the message in the appropriate language.

Formatters are attached to handlers using the setFormatter method.

With WebSphere® Application Server, you can configure the formatter to work with trace, the SystemOut.log, and theSystemErr.log log files:

You can select a formatter for a handler using the administrative console panels. See Diagnostic trace service settings for details.

You can find the java.util.logging documentation at http://java.sun.com/javase/.

New feature New feature: This topic references one or more of the application server log files. Beginning in WebSphere Application Server Version 8.0 you can configure the server to use the High Performance Extensible Logging (HPEL) log and trace infrastructure instead of using SystemOut.log , SystemErr.log, trace.log, and activity.log files or native z/OS logging facilities. If you are using HPEL, you can access all of your log and trace information using the LogViewer command-line tool from your server profile bin directory. See the information about using HPEL to troubleshoot applications for more information on using HPEL.newfeat



Related concepts
Loggers
Log handlers
Log filters
Related tasks
Using HPEL to troubleshoot applications
Related reference
Diagnostic trace service settings
Log levels
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Last updatedLast updated: Feb 6, 2014 8:11:25 PM CST
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